US2457326A - Trolley glider - Google Patents

Description

De c. 23, 1948. w; w. SLOANE TRQLLEY GLIDER Filed March 2, 1945 Patented Dec. 28, 1948 curred TROLLEY GEID'ER."

William Wl' Sloane, Chicago,1 ,Ill-., assign'or': to

Goodman Manufacturing cdmpany, Chicago, 111., a. corporation of Ill-ihois Application March-2, 1945,- Serial--*Nt 580,593

4' Claims." 1

This invention relates to improvements in trolley gliders adapted to collect current fromv a. trolley wire.

The principal objects of my inventioncare' to provide a new and improved. .trolleyglideripar- 5 ticularly adapted to supply current to heavy duty mine locomotives withoutan-undue amountofv heating, and so arranged as tohave substantially the same contact areain engagement with. the: trolley wire when-the glider is slidingsalongl acurved trolley wire as when slidingv along astraight trolley wire One dificulty in designing current collectors of the trolley glider type for use. in collecting current for heavy duty locomotives. operaltllev underground in mines, is that in underground: operation the radius of curvature of the currvescis relatively short with the result that the collectoritself must be correspondingly short inordeimto properly operate around the curves and through switches and crossings. Ashort collector oitentimes does not have sufficient contact area=to adequately supply the locomotive with current, and where the collecting surface is extended beyond the ends of the flanges of the collector, the collector frequently does not make full contact with the trolley wire when negotiating sharp turns where the heaviest loads are oftenen-' countered.

In carrying out my invention I provide a trolley I glider vwherein a portiononly of the contact surface of said glider is flanged, to form a-groove to-l retain the glider to the trolley wire, and I extend. the ends of the contact surface-beyond the ends:

of the groove and flare the-ends ofthese contact" surfaces laterally beyond the lateral limits-ofiithe flanges, so the contact surface willhave' substan tially the same contact area in engagement with? the trolley wire when in contact with a curving trolley wire as when in contact with a straight trolley wire. I also provide cooling fins on opposite sides of the glider to circulate the air therearound and to keep down the temperature of the glider, due to the heavy current loads, carried thereby, and also to cool the glider by radiation.

These and other objects of" myiinvention will appear from time to time as the following specification proceeds and with reference to theaccomlpanying drawings wherein:

Figure 1 is a view in side elevation of l-atrolley glider mounted on the end of a trolley pole and shown in contact with a trolley wire;

Figure 2 is a plan view of the glider shown in Figure 1; 56

2; Figure 3 is a rear end view of thetglidenshown inFigure 1; v

Figure 4 is a frontiend: view 015 the glider shown iii Figure I ;v and Figure 5 is a transverse sectionalJviewv-oilythe lider) taken substantially a1ong;.l-i'ne 5 5 ct In thedrawings a. trolley glider III is pivotally mounted between the furcati'ons of a bifurcated. trolley harp II on apivotalpinilir Saidharp in turn is pivoted on a socket I4 on an upright pivotal pin- I5, which socket is-mounted on the freeend of. a trolley pole (not shown) Said.harp,-

socket and trolleynpol e are of. a construction-wellik'nownto those skilled in the art and are no -par-t of Jmy present invention, so will not herein be circulate along all portions of the body cream glider; to cool said glider by convection; al'so are created by. the heavy current'loads carried during" operation of the locomotive: Two flexible'shunts 2r, 2 I connect said glider-with a contact terminal 22'whichis mountedbeneath the socket I41 Said" contact terminal is adaptedto have a" suitable electricconductor (notshown) connected-thereto, toc'onduct current from said glider tothe"electri"'- cal bperatingparts of the locomotive;

The contact surface I 8 of the 'trolleyigli'der has" a: grooved "central portion; the groove of which" is formed bya pair of laterally spaced flanges: 23;

23", extending: "along the opposite sides" of said contact surface --for"a portion of its lengthand'. curved-downwardly'to the level offsa'id contact surface at" their ends: Said contactsurface has an advance portion" z t-extending forwardly; of

said flanges ontthe' same level as the bottom'cf" 50, the :groove' thereof andlfiared outwardly beyond the. lateral limits. of said. flanges intmuchlthe form of'a beaver tail, to provide an outwardly flaring elongated contact surface beyond the advance ends of said flanges, which is sufficiently wide to afford substantially the same contact surface in contact surface arranged to catch the air circulated by said first mentioned cooling fins and cause it to further circulate past said glider.

3. A current collector comprising a glider having an elongated upper contact surface adapted to engage and slide along a trolley wire for collecting current therefrom, said glider having spaced flanges extending along said contact surface for a portion of its length and forming a groove to retain said glider to the trolley wire, and said contact surface extending a substantial distance beyond the ends of said flanges and havthe rear ends of the flanges 23, 23. .Said portion versely extending rib 21, which aids in radiating the heat created by the heavy current loads passing through the glider. V

While I have herein shown and described one form in which my invention may be embodied, it will be understood that the construction thereof and the arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, I do not wish to be construed as limiting my invention to the specific embodiment illustrated, excepting as it may be limited in the appended claims.

I claim as my invention:

1. A current collector comprising a glider hav ing an elongated upper contact surface adapted to collect current from a trolley wire, a portion,

of said contact surface being flanged to form a groove to retain said glider to the trolley wire, and the advance end of said contact surface being flared out beyond the lateral boundaries of said flanges to afford substantially the same contact surface with the trolley wire when in contact with acurving trolley wire as when in contact with a straight trolley wire, said end of saidcontact surface terminating into a relatively heavy 'rib extending transversely of the advance end of said glider to radiate the heat caused by the heavy current loads passing therethrough, and a plurality of cooling fins disposed beneath said contact surface and extending laterally from said glider .to circulate the air around said glider upon movement thereof and to maintain said glider at a predetermined low temperature both by convection and radiation. I

2. A current collector comprising aglider'having an elongated upper contact surface'adapted to collect current from a trolley wire, a portion of said contact surface being flanged to form a groove to retain said glider to the trolley wire, the, ad- Vance end of said contact surface being flared out beyond the lateral boundaries of said flanges to afford substantially the same contact surface with the trolley wire when in contact with .a curving trolley wire as when in contact with a straight trolley wire, said end of said contact surface terminating into a relatively heavy rib extending transversely of the advance end of said glider to radiate the heat caused by the heavy current loads passing therethrough, and a plurality of cooling fins disposed beneath said rib and inclined downwardly from said contact sur-. face tofcirculatethe air thereby, and other,cool, ing fins disposed beneath the rear portion ofjsaid ing opposite ends widened out beyond the lateral limits of said flanges a distance sufficient to afford substantially the same contact surface with the trolley wire when in contact with a curving trolley wire as when in contact with a straight trolley wire, the advance and rear ends of said contact surfaces terminating into relatively heavy ribs extending transversely of said glider to radiate the heat caused by the heavy current loads passing therethrough, and a plurality of cooling fins, disposed beneath said contact surface to circulate the air past said glider upon travel of said glider along the trolley wire, to maintain said glider at a relatively low temperature both by convection and radiation.

4. A current collector comprising a glider having an elongated upper contact surface adapted to engageand slide along a trolley wire for collecting current therefrom, said glider having spaced flanges extending along said contact surface for a portion of its length and forming a groove to retain said glider to the trolley wire, and said contact surface extending a substantial distance beyond the ends of said flanges and having opposite ends widened out beyond the lateral limits of said flanges a distance sufficient to afford substantially the same contact surface with the trolley wire when in contact with a curving trolley wire as when in contact with a straight trolley wire, the advance and rear ends of said contact surfaces terminating into relatively heavy ribs extending transversely of said glider to radiate the heat caused by the heavy current loads passing therethrough, a plurality of cooling fins, disposed beneath said contact surface to circulate the air past said glider upon travel of said glider along the trolley wire, to maintain said glider at a relatively low temperature both by convection and radiation, said cooling fins including a plurality'of cooling fins disposed beneath said advance rib and extending parallel thereto and then being inclined downwardly to direct the air towards the lower rear portion of said glider, and a plurality of coolingfins disposed beneath the rear contact portion of said glider for catching the air currents set up by said first mentioned fins and directing the air along the rear portion of 1 said glider.

WILLIAM W. SLOANE.

v REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number I Name Date 1,027,756 Prack May 28, 1912 1,358,205 Heydon Nov. 9, 1920 1,817,175 Chandler Aug. 4, 1931

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